Here is an array of motor mount sizes including interchangable designs that allow the use of several motor diameters in the same rocket.

PML produces a unique interchangable motor mount adapter called the Kwik-Switch 2000 that uses a threaded coupler that is very durable and reliable. Motors can be friction fit into the adapter, prepped, then screwed in the rocket. The KS2000 system uses our 54, 38, and 29mm phenolic airframe tubing, and custom-cast urethane parts for the screw-together parts.

The Kwik-Switch 2000, whether as a stand-alone part for scratchbuilds or used in kits, comes with the 54mm main motor tube, and 38mm and 29mm adapters included.

The standard Kwik-Switch system fits all 29mm reload casings, the 38mm 240, 380, 480, 600, and 720 casings, and the 54mm 852 and 1280 casings. The Extended Kwik-Switch will fit all the above and adds the 54mm 1706 casing. The J570 casing is not recommended for the Extended Kwik-Switch.

See our FAQ (link below) for more information about use of a J570 casing with Kwik-Switch systems. (Requires ADPTR-54/38HD below; Extended KS not recommended).

There are HAMR Motor Mount Adapters available for 54/38, 54/29 and 38/29 that are specifically designed for the HAMR system!

PML also produces friction fit adapters with a built-in thrust ring to prevent the adapter from being pushed through during the thrust phase.

.

Part#

Description

Cost

Qty.

KS-KIT-2K

Kwik Switch 2000
Motor Mounts:

The Kwik Switch. The first and only
interchangeable motor mount system in the industry just got
better! Once the 54mm mother tube is installed in your rocket,
you can change up to 38mm or 29mm by just screwing in the
adapters. Approximately 13.5" usable length. Assembles in just
minutes. (This system must be incorporated during initial
assembly.)

With the advent of 98mm motors, many people are building large rockets with 98mm motor mount tubes. Some of these rockets can be successfully flown with 75mm and 54mm motors as well. We have developed a giant, heavy-duty version of our original locking-tab style Kwik-Switch motor mount to allow you to easily and safely change from one motor size to another in a matter of seconds. This mount is available with 98/75/54mm adapters, or with just 98/54mm adapters. Each adapter is also available individually, as is the 98mm Mother Tube system (so you can build it into your rocket and add adapters later).

The 98mm Kwik Switch kit includes:

1) 36" long 98mm tube (PT-3.9)

1) 36" long 75mm tube (PT-3.0)

1) 36" long 54mm tube (PT-2.1)

All necessary locking & centering rings

All necessary locking tabs (already installed in 98mm Mother Tube)

42.2 oz.

$92.99

KS-98/75-KIT

Complete system less 54mm Adapter.

28.4 oz.

$68.99

KS-98/54-KIT

Complete system less 75mm Adapter.

28.4 oz.

$59.99

KS-98-MOT TUB

98mm Mother Tube system only

16.8 oz.

$30.99

KS-98/75-ADPT

75mm Adapter Only

13.8 oz.

$38.99

KS-98/54-ADPT

54mm Adapter Only

11.8 oz.

$28.99

KS-75/54-KIT

75/54 Kwik-Switch Motor Mounts:

Similar to our Giant KS 98mm system above, we also offer a 75/54mm original locking-tab style Kwik-Switch motor mount for the popular 75mm motors. This mount comes with the 75mm mother tube and 54mm adapter. The 75/54mm adapter is available individually, as is the 75mm Mother Tube system (so you can build it into your rocket and buy the 54mm adapter later).